Running stereo through a single tube with dual triodes?

RockysDad · 20th January 2009, 06:36 PM

There are numerous amplifier designs where both left and right channels are going into a single dual triode tube (ie TubeLabs Simple SE). What is everyones take on cross talk between the two inputs espeically where there is high gain involve in the driver tube. Is anyone worried that one channel will be heard in the other? I've also seen finished amps where the purist would use two tubes (one for each channel) and only use half (one triode)of it. Is this a waste of power or is there something to be gained when going this route? Just wondering...

ErikdeBest · 20th January 2009, 06:42 PM

Crosstalk in twintriodes?

ray_moth · 21st January 2009, 12:47 AM

HJ Leak did this when they started building stereo amps, e.g. in the Stereo 20. The first stage of each channel was a shared ECC83. I doubt very much if cross-talk would be much of an issue.

20th January 2009, 06:36 PM	#1
RockysDad diyAudio Member Join Date: Sep 2003 Location: Bay Area, CA	Running stereo through a single tube with dual triodes? There are numerous amplifier designs where both left and right channels are going into a single dual triode tube (ie TubeLabs Simple SE). What is everyones take on cross talk between the two inputs espeically where there is high gain involve in the driver tube. Is anyone worried that one channel will be heard in the other? I've also seen finished amps where the purist would use two tubes (one for each channel) and only use half (one triode)of it. Is this a waste of power or is there something to be gained when going this route? Just wondering...

20th January 2009, 06:42 PM	#2
ErikdeBest mostly thinkerer diyAudio Member Join Date: Mar 2003 Location: Maputo - Mozambique	Crosstalk in twintriodes? __________________ my surname is indeed 'de Best': neither misspelling nor snobbism! Ask SY!

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21st January 2009, 12:47 AM	#3
ray_moth diyAudio Moderator Emeritus Join Date: Jan 2004 Location: Jakarta	HJ Leak did this when they started building stereo amps, e.g. in the Stereo 20. The first stage of each channel was a shared ECC83. I doubt very much if cross-talk would be much of an issue.